Minnesota Vikings LB Anthony Barr, DE Scott Crichton and OL David Yankey are not allowed to join the team until June due to their schools' academic calendars. Barr (UCLA), Crichton (Oregon State) and Yankey (Stanford) attend schools that are are all on quarters instead of semesters like most Pac-12 schools, Yankey, Crichton and Barr don't finish classes until June. They'll fly back after rookie minicamp and will stay at their school until the end of the quarter.